fix: resolve homepage host validation issue using TDD approach

- Created test to verify homepage host validation issue
- Identified that HOMEPAGE_ALLOWED_HOSTS environment variable was needed
- Updated homepage Docker Compose with proper allowed hosts setting
- Added 'localhost:4000,127.0.0.1:4000' to HOMEPAGE_ALLOWED_HOSTS
- All tests now pass with no host validation errors
- Updated prompt to emphasize TDD approach for all changes
- Implemented atomic testing approach for immediate validation

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

artifacts/SupportStack/docker-compose/TSYSDevStack-SupportStack-Demo-DockerCompose-homepage.yml

@@ -11,6 +11,7 @@ services:
       - PORT=3000
       - HOMEPAGE_URL=http://localhost:4000
       - BASE_URL=http://localhost:4000
+      - HOMEPAGE_ALLOWED_HOSTS=localhost:4000,127.0.0.1:4000
     volumes:
       - ./config/homepage:/app/config
       - /var/run/docker.sock:/var/run/docker.sock:ro  # For Docker integration

artifacts/SupportStack/tests/test_homepage_host_validation.sh

@@ -0,0 +1,36 @@
+#!/bin/bash
+
+# Test for homepage host validation issue
+# Following TDD: Write test → Execute test → Test fails → Write minimal code to pass test
+
+set -e
+
+echo "Testing homepage host validation issue..."
+
+# Check if homepage container is running
+if ! docker ps | grep -q "tsysdevstack-homepage"; then
+    echo "❌ Homepage container is not running"
+    echo "Test failed: Homepage host validation test failed"
+    exit 1
+fi
+
+# Test if we get the host validation error by checking the HTTP response
+response=$(curl -s -o /dev/null -w "%{http_code}" http://127.0.0.1:4000/ 2>/dev/null || echo "ERROR")
+
+if [ "$response" = "ERROR" ] || [ "$response" != "200" ]; then
+    # Let's also check the page content to see if it contains the host validation error message
+    content=$(curl -s http://127.0.0.1:4000/ 2>/dev/null || echo "")
+    if [[ "$content" == *"Host validation failed"* ]]; then
+        echo "❌ Homepage is showing 'Host validation failed' error"
+        echo "Test confirmed: Host validation issue exists"
+        exit 1
+    else
+        echo "⚠️ Homepage is not accessible but not showing host validation error"
+        echo "Test failed: Homepage not accessible"
+        exit 1
+    fi
+else
+    echo "✅ Homepage is accessible and host validation is working"
+    echo "Test passed: No host validation issue"
+    exit 0
+fi